Wearable Core Temperature Monitoring With Skin-Safe Adhesive

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Solution Overview

Problem

Existing personal health monitoring devices prone to shifting during strenuous athletic activities, leading to inaccurate data collection and using harmful acrylate-based adhesives that irritate the skin.

Innovation Solution

A wearable device with a biocompatible silicone-acrylate adhesive and multiple sensors to measure physiological and biomechanical parameters, including core body temperature, that remains securely affixed during intense activities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If acrylate-based adhesive is used to prevent device shifting, then device stability is improved, but skin irritation and harmful reactions occur

Engineering Contradiction:

Improvedevice stabilityVSAvoidskin irritation

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical composition parameters of the adhesive from traditional acrylate-based formulations to a biocompatible formulation containing silicone oil, polyisobutylene, and zinc oxide. This parameter change maintains the adhesive's stabilizing function while eliminating skin irritation effects.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the potentially harmful acrylate-based adhesive into a beneficial biocompatible adhesive formulation. The new formulation uses safe ingredients like silicone oil and zinc oxide that not only prevent device shifting but also provide skin-protecting benefits during prolonged wear.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Ease of operation

If wrist or chest strapping is used to wear the device, then device portability is improved, but position shifting during strenuous activity occurs leading to inaccurate data

Engineering Contradiction:

Improvedevice portabilityVSAvoiddata accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent introduces a specialized adhesive as an intermediary between the device and the skin. This adhesive mediator provides strong bonding that prevents device shifting during strenuous activity while allowing for easy application and removal, thus maintaining both portability and measurement precision.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If traditional health monitoring devices are used, then basic monitoring functionality is provided, but comprehensive workload details including core body temperature are not available

Engineering Contradiction:

Improvemonitoring comprehensivenessVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a multi-functional device that combines ECG monitoring, temperature sensing, accelerometry, and biocompatible adhesive technology into a single wearable unit. This universal device provides comprehensive workload assessment including core body temperature prediction while maintaining ease of use through integrated functionality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Provides accurate, comprehensive data on user workload and health metrics without skin irritation, using a biocompatible adhesive that maintains device position and enhances data reliability.

Implementation Method 1

The first temperature sensor is configured to measure a first temperature, namely, a temperature of skin of the user

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

The second temperature sensor is configured to measure a second temperature, namely, a temperature of ambient air outside the wearable device

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Implementation Method 3

the processor is configured to determine at least one metric indicative of the core temperature of the user from the first temperature and the second temperature

Methodology Applied

Scientific EffectTemperature gradient: Temperature Gradient

Implementation Method 4

The wearable device utilizes a biocompatible adhesive, such as a silicone-acrylate-based adhesive, to be affixed to the user

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS12629038B2Device for human performance assessment and monitoring

Publication Date: 2026.05.19 PREDICOR LLC

AI summary

A wearable device for monitoring physiological and biomechanical parameters of a user includes a primary electronics body having a processor, a first temperature sensor, and a second temperature sensor. The first temperature sensor is in electrical communication with the processor and configured to measure a temperature of skin of the user. The second temperature sensor is in electrical communication with the processor and is configured to measure a temperature of ambient air outside the wearable device. The processor is configured to receive the measured temperatures from the first temperature sensor and the second temperature sensor, and to determine at least one metric indicative of the core temperature of the user without an invasive measurement of the body of the user.